So the installation was not easy, but I finally managed to install all carefully. I made a super clean windows 7 ultimate 64 bit installation and installed all driver correctly.

The cpu doesn't seem to be hot, since the temperature is around 28°C idle, and 35-40°C playing ultra settings games like Batman arkham city, diablo 3 and starcraft 2. The only problem is this annoying stuttering. It happens in Diablo 3 and arkham city. The game suffer from micro freeze every 20-30 sec, and this is very annoying for my gaming experience. The graphic settings are all maxed off in both game.

So what do you think about this issue and which component could be the source of the problem? Thank you very much in advance. Regards.

Things you can try:
- Download and clean install the latest Nvidia drivers
- Run a RAM checker
- Open the task manager and check for CPU spikes

Click to expand...

Yeah, make sure you install the latest nVidia drivers. If that doesnt work, it is most likely a faulty component like RAM (like slh said) or your internet connection. Run an internet SpeedTest for us please.